CN106597052A - Novel all-fiber current transformer and manufacturing method for interference part thereof - Google Patents
Novel all-fiber current transformer and manufacturing method for interference part thereof Download PDFInfo
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- CN106597052A CN106597052A CN201610983119.4A CN201610983119A CN106597052A CN 106597052 A CN106597052 A CN 106597052A CN 201610983119 A CN201610983119 A CN 201610983119A CN 106597052 A CN106597052 A CN 106597052A
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- fiber optic
- optic loop
- fiber
- interference part
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- 239000000835 fiber Substances 0.000 title claims abstract description 103
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000013307 optical fiber Substances 0.000 claims abstract description 22
- 230000003287 optical effect Effects 0.000 claims abstract description 20
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 claims abstract description 17
- 125000002619 bicyclic group Chemical group 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 20
- 239000012212 insulator Substances 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 230000010287 polarization Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000000644 propagated effect Effects 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 2
- 238000005388 cross polarization Methods 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 206010068052 Mosaicism Diseases 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000004038 photonic crystal Substances 0.000 description 2
- 210000003765 sex chromosome Anatomy 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000005426 magnetic field effect Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
- G01R15/245—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect
- G01R15/246—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices using magneto-optical modulators, e.g. based on the Faraday or Cotton-Mouton effect based on the Faraday, i.e. linear magneto-optic, effect
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention relates to a novel all-fiber current transformer. The novel all-fiber current transformer is characterized by comprising a super-radiance LED (Light Emitting Diode) light source, a polarization-maintaining optical fiber coupler, a lithium niobate integrated optical modulator, a wave plate, a photoelectric detector, an interference part and a full-digital closed loop processing circuit which are connected through a polarization-maintaining optical fiber, wherein the interference part comprises a double-ring fiber loop and a heat-insulating device. The invention also provides a manufacturing method for the interference part. The novel all-fiber current transformer has the advantages of reasonable and simple structure, wide applicable temperature scope, high measuring precision, low cost, and the like.
Description
Technical field
The present invention relates to all-fiber current transformator, is a kind of harsh suitable for temperature conditionss（-40℃~60℃）It is new
The manufacture method of all-fiber current transformator and its interference part.
Background technology
All-fiber current transformator is that one kind is directly surrounded on optical fiber on tested wire as sensing element, with
Based on Faraday magneto-optic effects, the novel high-pressure testing current equipment of Closed loop Control is comprehensively utilized.With power system
The continuous improvement of middle line voltage grade, capacity constantly increase, used as the electric current of one of important monitoring device in intelligent substation
The update of transformer is extremely urgent, all-fiber current transformator with its insulation system it is simple, Electro Magnetic Compatibility is strong, dynamic
State scope is big, small volume, it is lightweight, paid close attention to by people without hysteresis, without advantages such as subsequent explosion danger without magnetic saturation,
Become the preferable substitute products of conventional electromagnetic current transformer.Therefore, the precision of all-fiber current transformator is further improved
And reliability, it is most important to power industry.The certainty of measurement and reliability of all-fiber current transformator is largely relied on
In the performance and reliability of fiber interferometer, the change of temperature can cause sensing fiber coil to produce linear birefrigence, to full light
The precision of fiber current mutual inductor produces large effect, while can also cause the change of Verdet constant, directly affects faraday
The anglec of rotation, so as to affect system output current size, causes measurement error.Therefore, it is necessary to take related means to reduce
The impact that temperature is caused.For above-mentioned situation, prior art is reduced entirely using means such as twisted fiber, ellipse birefringence optical fiber
The drift that optical fiber current mutual inductor causes because of temperature, although these measures inhibit to a certain extent temperature drift, while
Also bring involve great expense, the practical sex chromosome mosaicism such as complex structure；Prior art is substituted tradition using photonic crystal fiber and protects polarisation
Fibre makes optical fiber sensing ring, but because polarization-maintaining photonic crystal fiber technology itself is immature, is extremely difficult in pulling process
Expected ideal effect, so needing to be tested in real process；Prior art reduces temperature drift, but intelligence using algorithm compensation
Can algorithm in off-line case to the experiment effect of temperature-compensating preferably, but in practical application the big poor real of data volume almost without
Method is used.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of rational in infrastructure, simple, Applicable temperature scope
Extensively, certainty of measurement is high, the new all-fiber current transformator of low cost, and the manufacture method for providing its interference part.
Realize that the technical scheme that one of the object of the invention is adopted is：A kind of new all-fiber current transformator, is characterized in that,
It includes：Super-radiance light emitting diode light source, polarization-maintaining fiber coupler, lithium niobate integrated optical manipulator,Wave plate, photoelectricity
Detector, interference part and complete-digital closed-loop process circuit are connected by polarization maintaining optical fibre；Described interference part includes bicyclic light
Fine ring and attemperator；The light that super-radiance light emitting diode light source sends is divided into two beams by polarization-maintaining fiber coupler, wherein one
Shu Guang enters into lithium niobate integrated optical manipulator by the input of lithium niobate integrated optical manipulator, is divided into by optical modulator
Two equal portions, are exported respectively by two outfans of lithium niobate integrated optical manipulator, and are injected into the bicyclic optical fiber of interference part
In ring, while along being transmitted clockwise and counterclockwise, the two-beam propagated through the bicyclic fiber optic loop of interference part is returned
Lithium niobate integrated optical manipulator is returned to, after polarization-maintaining fiber coupler coupling photoelectric detector is reached.
Realizing the technical scheme of two employings of the object of the invention is：A kind of manufacture method of interference part, is characterized in that, it
Comprise the following steps：
1）The coiling of bicyclic fiber optic loop：Fiber optic loop around one end coiling in one direction for being made as fiber optic loop, the coiling of midpoint both sides
Direction is single and conversely, forms two little column type winding fiber optic loop placed back-to-back, the corresponding one end of two rings connects, in ring
Between be adhesively fixed with glue；
2）Attemperator is made up of end cap, adiabatic rubber cushion and thermal insulator, and the thermal insulator inner and outer wall of attemperator adopts non-ferric
Magnetic material, is tightly connected to form confined space and extracting vacuum between outer wall and inwall；
3）By step 1）The bicyclic fiber optic loop of coiling is set on fiber optic loop fixed cover, and is placed in step 3）Constitute in attemperator
Interference part.
A kind of new all-fiber current transformator of the present invention, as a result of bicyclic fiber optic loop and matched insulation
The interference part that device is constituted, bicyclic fiber optic loop veritably realizes fiber optic loop midpoint both sides optical fiber loop spatially symmetrically, adopts
Double-pillar is simpler around ring method, while employing attemperator ensures each ring temperature point in fiber optic loop midpoint both sides
Cloth is symmetrical and same ring temperature is identical, so as to solve the symmetrical sex chromosome mosaicism of Temperature Distribution, therefore, coordinate the Double-pillar of attemperator
The fiber optic loop of winding has preferable inhibition to the drift of all-fiber current transformator thermic, is favorably improved full optical-fiber current mutual
The certainty of measurement of sensor.With structure rationally, simply, Applicable temperature scope is wide, and certainty of measurement is high, low cost and other advantages.
Description of the drawings
Fig. 1 is the new all-fiber current transformator structural representation of the present invention；
Fig. 2 is interference part dimensional structure diagram in Fig. 1；
Fig. 3 is that bicyclic fiber optic loop adopts Double-pillar winding schematic diagram in Fig. 1.
Specific embodiment
The present invention is described in more detail below in conjunction with accompanying drawing.
As shown in figure 1, the new all-fiber current transformator of the present invention, including super-radiance light emitting diode light source 1, protect inclined
Fiber coupler 2, lithium niobate integrated optical manipulator 3,Wave plate 4, photoelectric detector 5, interference part 6 and complete-digital closed-loop
Process circuit 7, wherein interference part 6 include that all of device is by single mode Bearss in figure using bicyclic fiber optic loop and attemperator
Cat type polarization maintaining optical fibre connects, and the light that super-radiance light emitting diode light source 1 sends is divided into two beams by polarization-maintaining fiber coupler 2, its
Middle light beam enters into lithium niobate integrated optical manipulator 3 by the input a of lithium niobate integrated optical manipulator 3, by Lithium metaniobate
Integrated optical modulator 3 is divided into two equal portions, is exported by two outfans b, c of lithium niobate integrated optical manipulator 3 respectively, and notes
Enter in interference part, while edge is transmitted clockwise and counterclockwise.Through two beams propagated using bicyclic fiber optic loop
Light returns to lithium niobate integrated optical manipulator 3, and after polarization-maintaining fiber coupler 2 is coupled photoelectric detector 5 is reached.
Photoelectric detector 5 detects light intensity signal, the phase contrast of two-beam interference is measured, by complete-digital closed-loop circuit
7 process computing, obtain the output signal of all-fiber current transformator, and at the same time, the signal can be used as the feedback of subsequent time
Signal transmission constitutes closed-loop path in lithium niobate integrated optical manipulator 3, and by signal processing the big of current in wire is calculated
It is little, realize that all-fiber current transformator measures the function of electric current.
Interference part 6 includes using bicyclic fiber optic loop and attemperator, the diameter of the bicyclic fiber optic loop, around ring mode,
Same around fine identical length, using back-to-back modes of emplacement, fiber optic loop midpoint both sides optical fiber loop is spatially symmetrical, attemperator
Ensure that bicyclic fiber optic loop Temperature Distribution is symmetrical and radially identical.
By the bicyclic fiber optic loop 606 and 607 of identical technique coiling, then bicyclic fiber optic loop splicing is connect into composition fiber optic loop
System, the winding method, optical fiber material and assembly method are as follows：
1) winding method is as follows：As shown in Figures 2 and 3, it is that the technique for coiling for ensureing fiber optic loop has repeatability, with reference to simple
Preparation technology, fiber optic loop adopts Double-pillar winding, and Double-pillar winding fiber optic loop is by two geometric parameters are identical, direction of winding
Contrary little column type fiber optic loop composition, two little column type fiber optic loop start simultaneously in opposite direction coiling, skeleton are taken off after complete
Go, two column type winding fiber optic loop being placed back to back are presented；
2) optical fiber material：Link optical fiber is single-mode polarization maintaining fiber, and optical fiber needed for fiber optic loop can adopt the spy with temperature stability
Plant optical fiber；
3) bicyclic fiber optic loop assembly method is as follows：The bicyclic fiber optic loop 606 and 607 of identical is placed back-to-back and corresponding one end
Splicing, a fiber optic loop is served as between two rings with the splicing that is adhesively fixed of glue 608, adjusts two fiber optic loop so as to be finally reached two
The splicing mouth of individual ring is equivalent to the midpoint of single ring, i.e., splicing mouth both sides fiber lengths are identical, while ensureing splicing mouth both sides
The each circle optical fiber of fiber optic loop is all symmetrical along backside space is leaned against.
To ensure the bicyclic fiber optic loop Temperature Distribution placed in attemperator along symmetrical back-to-back.Attemperator sets
Meter, assembling mode and working mechanism are specially：
1) attemperator is made up of end cap 601, adiabatic rubber cushion 602 and thermal insulator 603.Thermal insulator is by outer wall 604 and inwall 605
Constitute；
2) end cap 601 adopts hardness strong and not every the nonferromugnetic material of magnetic, outer wall with thermal insulator outer wall 604 and inwall 605
It is tightly connected to form confined space between 604 and inwall 605, it is good and do not affect magnetic field effect that extracting vacuum constitutes thermal insulation
Heat-insulated cavity；
3) by bicyclic fiber optic loop 606 with 607 with the bonding of glue 608 into fiber optic loop integral assembling press on fiber optic loop fixed cover 609
Tightly prevent fiber optic loop from moving about；
4) the bicyclic fiber optic loop of bonding is placed in thermal insulator, is installed into insulation by being threaded on fiber optic loop fixed cover 609
In vivo, provide one for fiber optic loop and stablize symmetrical temperature environment relatively；
5) working mechanism of attemperator is as follows:When attemperator contacts uneven external temperature or exterior temperature change is frequent
Or exterior temperature change amplitude it is larger when, the thermal insulator with certain vacuum degree can prevent the conduction of heat of inside and outside wall, it is ensured that protect
Temperature is basically unchanged and is evenly distributed in warm device, provides one to the fiber optic loop in cavity and stablizes symmetrical environment relatively.
The assembly method of new all-fiber current transformator of the present invention is：By the little column type fiber optic loop 606 of two identicals
With 607（I.e. bicyclic fiber optic loop）Simultaneously coiling in opposite direction, the little column type fiber optic loop 606 and 607 of two identicals is corresponding
One end splicing, with glue 608 by its back-to-back bonding, be set on fiber optic loop fixed cover 609 compress extremely prevent fiber optic loop move about,
Fixed placement constitutes complete attemperator in thermal insulator 603 by the assembling of adiabatic rubber cushion 602 and end cap 601, ensures two
The each ring of individual fiber optic loop is spatially symmetrical.Another termination of the little column type fiber optic loop 606 and 607 of two identicals passes through
The aperture of end cap 601 is drawn, and two optic fibre ends of extraction are connected respectively with corresponding light path.After assembling is finished, interference part 6 can
Ensure that its internal fiber optic loop realizes midpoint both sides optical fiber loop spatially symmetrically while bicyclic fiber optic loop Temperature Distribution edge leans against
The back side and radial symmetric, can realize the drift caused by the maximum compensation temperature of fiber optic loop itself, new so as to improve
The precision of type all-fiber current transformator.
Embodiments of the invention are only used for that the present invention is further illustrated, not exhaustive, and not constituting will to right
Ask the restriction of protection domain, the enlightenment that those skilled in the art obtain according to embodiments of the present invention, without creative work just
It is conceivable that the replacement of other substantial equivalents, in the scope of the present invention.
Claims (2)
1. a kind of new all-fiber current transformator, is characterized in that, it includes：Super-radiance light emitting diode light source, polarization maintaining optical fibre
Bonder, lithium niobate integrated optical manipulator,Wave plate, photoelectric detector, interference part and complete-digital closed-loop process circuit lead to
Cross polarization maintaining optical fibre connection；Described interference part includes bicyclic fiber optic loop and attemperator；Super-radiance light emitting diode light source is sent out
The light for going out is divided into two beams by polarization-maintaining fiber coupler, and wherein light beam is entered by the input of lithium niobate integrated optical manipulator
To lithium niobate integrated optical manipulator, two equal portions are divided into by optical modulator, respectively by the two of lithium niobate integrated optical manipulator
Individual outfan output, and be injected in the bicyclic fiber optic loop of interference part, while edge is transmitted clockwise and counterclockwise,
The two-beam propagated through the bicyclic fiber optic loop of interference part returns to lithium niobate integrated optical manipulator, through polarization maintaining optical fibre coupling
Photoelectric detector is reached after clutch coupling.
2. new all-fiber current transformator according to claim 1, is characterized in that, the manufacture method of the interference part
Comprise the following steps：
1）The coiling of bicyclic fiber optic loop：Fiber optic loop around one end coiling in one direction for being made as fiber optic loop, the coiling of midpoint both sides
Direction is single and conversely, forms two little column type winding fiber optic loop placed back-to-back, the corresponding one end of two rings connects, in ring
Between be adhesively fixed with glue；
2）Attemperator is made up of end cap, adiabatic rubber cushion and thermal insulator, and the thermal insulator inner and outer wall of attemperator adopts non-ferric
Magnetic material, is tightly connected to form confined space and extracting vacuum between outer wall and inwall；
3）By step 1）The bicyclic fiber optic loop of coiling is set on fiber optic loop fixed cover, and is placed in step 3）Constitute in attemperator
Interference part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610983119.4A CN106597052B (en) | 2016-11-09 | 2016-11-09 | A kind of production method of novel all-fiber current transformator and its interference part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610983119.4A CN106597052B (en) | 2016-11-09 | 2016-11-09 | A kind of production method of novel all-fiber current transformator and its interference part |
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| Publication Number | Publication Date |
|---|---|
| CN106597052A true CN106597052A (en) | 2017-04-26 |
| CN106597052B CN106597052B (en) | 2019-05-03 |
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| CN201610983119.4A Expired - Fee Related CN106597052B (en) | 2016-11-09 | 2016-11-09 | A kind of production method of novel all-fiber current transformator and its interference part |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561337A (en) * | 2017-09-01 | 2018-01-09 | 全球能源互联网研究院 | The preparation method of optical fiber current mutual inductor and its prepared optical fiber current mutual inductor |
| CN109884364A (en) * | 2017-12-06 | 2019-06-14 | 北京自动化控制设备研究所 | A kind of highly reliable optical fiber current mutual inductor sensing head |
| CN112129986A (en) * | 2020-08-10 | 2020-12-25 | 常州博瑞电力自动化设备有限公司 | Optical current transformer for high-voltage direct-current circuit breaker |
| CN112763782A (en) * | 2020-12-14 | 2021-05-07 | 河南平高电气股份有限公司 | All-fiber sensing ring of current transformer |
| CN115166922A (en) * | 2022-09-06 | 2022-10-11 | 中国船舶重工集团公司第七0七研究所 | Optical fiber ring convenient to disassemble and assemble and manufacturing method thereof |
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| US6301400B1 (en) * | 1998-11-12 | 2001-10-09 | Nxtphase Technologies Srl | Fiber optic current sensor having rotation immunity |
| CN101620287A (en) * | 2008-06-30 | 2010-01-06 | 上海新跃仪表厂 | Method for manufacturing full-fiber quarter wave plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107561337A (en) * | 2017-09-01 | 2018-01-09 | 全球能源互联网研究院 | The preparation method of optical fiber current mutual inductor and its prepared optical fiber current mutual inductor |
| CN109884364A (en) * | 2017-12-06 | 2019-06-14 | 北京自动化控制设备研究所 | A kind of highly reliable optical fiber current mutual inductor sensing head |
| CN112129986A (en) * | 2020-08-10 | 2020-12-25 | 常州博瑞电力自动化设备有限公司 | Optical current transformer for high-voltage direct-current circuit breaker |
| CN112129986B (en) * | 2020-08-10 | 2024-04-09 | 常州博瑞电力自动化设备有限公司 | Optical current transformer for high-voltage direct-current circuit breaker |
| CN112763782A (en) * | 2020-12-14 | 2021-05-07 | 河南平高电气股份有限公司 | All-fiber sensing ring of current transformer |
| CN115166922A (en) * | 2022-09-06 | 2022-10-11 | 中国船舶重工集团公司第七0七研究所 | Optical fiber ring convenient to disassemble and assemble and manufacturing method thereof |
| CN115166922B (en) * | 2022-09-06 | 2022-11-18 | 中国船舶重工集团公司第七0七研究所 | Optical fiber loop convenient to disassemble and assemble and manufacturing method thereof |
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|---|---|
| CN106597052B (en) | 2019-05-03 |
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